pgsql: Implement operators for checking if the range contains a multira

Implement operators for checking if the range contains a multirange

We have operators for checking if the multirange contains a range but don't
have the opposite.  This commit improves completeness of the operator set by
adding two new operators: @> (anyrange,anymultirange) and
<@(anymultirange,anyrange).

Catversion is bumped.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/4d7684cc754f312aee468abb83ca4f7da94b30a3

Modified Files
--------------
doc/src/sgml/func.sgml                           |  14 ++
src/backend/utils/adt/multirangetypes.c          |  60 ++++++
src/backend/utils/adt/multirangetypes_selfuncs.c |   6 +-
src/include/catalog/catversion.h                 |   2 +-
src/include/catalog/pg_operator.dat              |  12 ++
src/include/catalog/pg_proc.dat                  |   6 +
src/include/utils/multirangetypes.h              |   4 +-
src/test/regress/expected/multirangetypes.out    | 240 +++++++++++++++++++++++
src/test/regress/sql/multirangetypes.sql         |  40 ++++
9 files changed, 381 insertions(+), 3 deletions(-)